Biology EOCT Practice Questions names:
1. Which of the following is made up of two complementary chains of nucleotides?
A. ADP B. ATP C. DNA D. RNA
2. Which type of organism is an exception to cell theory?
A. bacterium B. fungus C. Protozoan D. virus
3. Protein synthesis occurs in which of the following cell organelles?
A. chloroplasts B. mitochondria C. nucleus D. ribosomes
4. A scientist conducted a study of algae in a pond. She observed that on clear days, algae could be found between one and six meters below the surface of the water. On cloudy days, however, algae could be found no more than one meter below the surface. What might the scientist conclude from these observations?
A. Light intensity affects the depth at which algae grow. B. Moisture in the air affects the depth at which algae grow.
C. Rainfall affects the depth at which algae grow. D. Wind direction affects the depth at which algae grow.
5. In rats, black fur (B) is dominant over white fur (b). In this cross between a hybrid black rat and a white rat, what percentage of the offspring will probably have black fur? à à à à à à
A. 25% B. 50% C. 75% D. 100%
6. Which method of reproduction ( in the picture to the right) will produce the greatest variation in offspring?
A. A B. B C. C D. D
7. A mouse skin cell contains 40 chromosomes. Based on this information, how many chromosomes would a mouse sperm cell contain?
A. 10 B. 20 C. 40 D. 80
8. In order from smallest to largest, the levels of organization in the human body are
A. cells, tissue, organs, systems, organism. B. cells, tissue, organism, systems, organs.
C. tissue, cells, systems, organs, organism. D. organism, organs, systems, tissue, cells.
9. In the diagram to the right, the concentration of ions and molecules outside the cell is most likely
A. twice as high as the concentration of ions and molecules inside the cell.
B. the same as the concentration of ions and molecules inside the cell.
C. lower than the concentration of ions and molecules inside the cell.
D. composed of a different variety of ions and
10. Alligators in wetland regions normally feed on animals such as shorebirds. Shorebirds usually feed on small fish and frogs to survive. Recently, scientists released a large number of alligators into a wetland region. Scientists expect that as a result of this increase in the alligator population, the population of small fish and frogs will
A. remain about the same. B. rapidly decrease. C. become extinct. D. notably increase.
11. Which of these is not associated with proteins?
A. amino acid B. enzyme C. polysaccharide D. peptide bond
12. Which of these represents a parasitic relationship?
A. plankton on a whale B. a tick on a dog C. Spanish moss on a tree D. a shark eating a fish
13. In the kidneys, the concentration of water is higher in the renal tubules than it is in the blood. The absorption of water from the blood into the renal tubules is achieved through
A. active transport. B. diffusion. C. osmosis. D. passive transport.
14. The chemical equation above lists the reactants, products, and energy requirements for what process?
A. fermentation B. photosynthesis C. protein synthesis D. respiration
15. DNA in an individual’s gametes will most likely be altered before being passed to offspring if exposed to
A.x-rays B. loud sounds C. magnetic fields D. extreme temperatures
16. Which organelle shown in the diagram to the right provides energy for the cell by performing aerobic respiration?
A. A B. B C. C D. D
17. During the process of cellular respiration, energy is obtained from
A. glucose. B. RNA. C. catalysts. D. lipids.
18. What are algae and slime molds examples of?
A. Fungi B. Bacteria C. Protists D. Sporozoans
19. What is the term for the role and position that a certain species of animal occupies in its environment?
A. habitat B. ecosystem C. community D. niche
20. As energy flows through an ecosystem, at each trophic level it
A. increases B. decreases C. fluctuates D. remains the same
21. What does the line graph to the right show?
A. Populations increase at a constant rate in ecosystems.
B. Populations usually increase rapidly and then level off.
C. Populations increase at an exponential rate.
D. Ecosystems are able to support any number of populations.
22. Which of the following chemical reactions occurs when a cell creates energy?
A. ATP creates more ATP B. ADP changes into ATP
C. ADP creates more ADP D. ATP changes into ADP
23. Which of these statements is true about the food web to the right?
A. Grizzly bears have the highest biomass.
B. Grasses have the lowest biomass.
C. Deer have a higher biomass than grizzly bears.
D. Seeds have a lower biomass than chipmunks.
24. Producers primarily obtain their energy from
A. nutrients in the soil. B. the sun. C. water. D. decomposing organisms.
25. Active transport of materials through a membrane against a concentration gradient requires
A. a carrier protein and energy. B. energy only. C. an isotonic solution. D. a carrier protein only.
26. What structures in plant cells capture light energy to produce food?
A. Chloroplasts B. Mitochondria C. Cilia D. Microfilaments
27. Which of the following is not associated with eukaryotes?
A. nucleus B. organelles C. capsule D. multicellular
28. An increase in aquatic phytoplankton in an aquatic biome such as a swamp might be the first evidence that
A. first-order heterotrophs have declined. B. first trophic-level organisms have declined.
C. second-order heterotrophs have increased. D. third-order heterotrophs have declined.
29. The cells of a dog’s tail contain 78 chromosomes. The spermatozoa of a dog contain
A. 39 chromosomes. B. 78 chromosomes. C. 117 chromosomes. D. 156 chromosomes.
30. A student wants to study the effect of chlorine on the growth of bacteria. The student sets up four test tubes and adds
20-mL of sterile beef broth to each test tube. The student adds 5-mL of chlorine solution to test tube A, 10-mL of chlorine solution to test tube B, 15-mL of chlorine solution to test tube C, and nothing to test tube D. The student then plugs the test tubes with cotton. Every day for a week, the student checks each test tube for signs of bacterial growth. What role does test tube D play in this experiment?
A. variable B. hypothesis C. catalyst D. control